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Home > CCA2 > Chapter 9 > Lesson 9.3.3 > Problem 9-103

9-103.
  1. North City High School has served the following number of lunches since the beginning of the school year. The data has been sorted. 9-103 HW eTool (CPM). Homework Help ✎

    Number of lunches sold per day

    576
    584
    594
    595
    603

    605
    606
    613
    618
    630

    632
    636
    640
    640
    652

    660
    661
    663
    665
    666

    671
    671
    675
    677
    678

    689
    695
    698
    703
    721

    723
    738
    745
    755
    774

    774
    785

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    1. What are the mean and standard deviation number of lunches in the sample?

    2. What is the five number summary of the distribution?

    3. Make a relative frequency histogram of the number of lunches served. Use a scale from 560 to 800 lunches, with a bin width of 40 lunches. Sketch the histogram and label the height of each of the bins.

    4. Describe the distribution. Make sure you consider the center, shape, spread, and outliers.

    5. Using your histogram, determine the percent of days on which fewer than 600 lunches were sold.

    6. Using the histogram, estimate the percent of days on which between 600 and 700 lunches were sold.

Use the eTool at the bottom for parts (a) - (c).

The typical number of lunches served is_____.
The shape is _____ and _____.
The standard deviation is about _____ lunches.
There are/are not apparent ouliers.

Use the eTool below for parts (a) - (c).
Click the link at right for the full version of the eTool: CCA2 9-103 HW eTool